Loon Lake Depth Map & Fishing Spots (Frontenac County, ON)

Target species

Species estimated from nearby surveyed lakes. No fish-species survey is on record for this water, so these species aren't a confirmed catch list. They're an informed estimate: the fish Ontario's MNRF actually recorded in the nearest surveyed lakes, kept only where they fit this lake's depth and habitat. Treat them as what's likely present. (The depth chart itself is real surveyed bathymetry.) How we estimate species →

Hatch outlook

Hopper & ant season (windward banks)Active window

Typical here: Jul 1 – Sep 15 · hoppers peak July–August; winged-ant falls show up on warm humid afternoons — a wind event, not a hatch

adultwarm, breezy afternoons, roughly 1–5pm — slap the imitation down hard — the splat is the trigger — then wait; count to three after the rise before setting

Work the windward bank on breezy summer afternoons — that's where the food is. Casting-bubble-and-hopper is the direct translation; otherwise run small topwaters and inline spinners tight along the grass edges and blowdown banks in the afternoon warmth.

The event happens over windward grassy banks, overhanging brush and blowdowns — wherever the breeze dumps the bugs

Next on this water

Fall shiner run · baitfishSep 1 – Oct 31 · in ~3 days

Hex (giant mayfly) · mayflyMay 25 – Aug 10 · in ~9 months

June mayfly hatch (walleye lakes) · mayflyJun 1 – Aug 10 · in ~9 months

Recommendations come from depth structure and seasonal species behavior. Treat them as a starting point, not a guarantee. Contours here are interpolated from real agency depth surveys (state DNR / USACE). Never use for navigation. Always check local regulations.

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Recent catches at Loon Lake

Shared by DepthScout anglers. Exact spots stay private, always.

No shared catches here yet — be the first.Log a catch from the map above and share it to put Loon Lake on the board.

Fishing Loon Lake: what the data says

43-acre lake in Frontenac County, Ontario. The lake tops out around 60 ft. The depth data here comes from a transect sounding survey by the Ontario MNRF. What follows comes from the same scoring engine that paints the spots above.

On the chart, Loon Lake draws 43 acres inside 1.3 miles of shoreline. Nearly circular (index 1.4), so the story is the bottom, not the bank. About 18% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. Figure 0.5 mi of water from one end to the other, 0.2 mi at the beam. The water lies in Frontenac County. Closest neighbour on DepthScout: Fourth Deposit Lake, 1 mi northeast of here.

Cisco (Lake Herring) fishing at Loon Lake

Spring cisco (lake herring) on Loon Lake hold shallow, usually 10 to 40 ft. By summer they slide out to 18 to 60 ft, and by winter most fish are in 20 to 60 ft. The chart's best answer is Deep basin — deep basin, 60 ft, prime for summer. Prime time lands in early morning. The summer box starts with a vertical flutter spoon (small) or a drop-shot micro plastic.

Season	Depth	Best window	Start at	Go-to baits
Spring	10 to 40 ft	dawn & dusk	Break off the point (38 ft)	Small silver spoon, Tiny swim jig (white)
Summer	18 to 60 ft	dawn	Deep basin (60 ft)	Vertical flutter spoon (small), Drop-shot micro plastic
Fall	5 to 25 ft	dusk & dawn	open water	Small casting spoon, Inline spinner (silver)
Winter	20 to 60 ft	dawn	Deep basin (60 ft)	Small jigging spoon (glow/silver), Tungsten jig + minnow head

Walleye fishing at Loon Lake

When the water first warms, walleye slide up into 4 to 15 ft. Summer is a 15 to 35 ft game here, winter a 20 to 40 ft one. Start at Break off the point. It's a drop-off holding about 38 ft of water and rates prime come fall. The feeding windows run the evening and early morning. Keep a crawler harness on bottom bouncer or a deep crankbait (trolled) rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	4 to 15 ft	dusk & dawn	open water	1/8 oz jig + minnow, Hair jig
Summer	15 to 35 ft	dusk & dawn	Main-lake point (21 ft)	Crawler harness on bottom bouncer, Deep crankbait (trolled)
Fall	12 to 40 ft	dusk & night	Break off the point (38 ft)	Jigging rap, Jig + big minnow
Winter	20 to 40 ft	dusk & dawn	Break off the point (38 ft)	Jigging spoon + minnow head, Rattle bait

Yellow Perch fishing at Loon Lake

When the water first warms, yellow perch slide up into 3 to 12 ft. By summer they slide out to 10 to 30 ft, and by winter most fish are in 15 to 35 ft. If you only fish one area, make it Shallow bay flat: a feeding flat around 6 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small spoon tipped with worm rigged through the warm months.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	midday & dawn	Shallow bay flat (6 ft)	Small jig + curly tail, Perch-pattern micro crank
Summer	10 to 30 ft	dawn	Break off the point (38 ft)	Drop-shot micro plastics, Small spoon tipped with worm
Fall	12 to 35 ft	midday	Break off the point (38 ft)	Jigging spoon (small), Perch rig / spreader
Winter	15 to 35 ft	midday & dawn	Deep basin (60 ft)	Tungsten jig + spikes, Rattle spoon (small)

Northern Pike fishing at Loon Lake

The spring pattern is a shallow one: northern pike in 2 to 8 ft. As the season builds they drop to 8 to 20 ft, wintering in 5 to 15 ft. Top water on the chart: Shallow bay flat, a feeding flat in the 6 ft range, prime in spring. Time it for early morning and the evening. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 8 ft	midday & dawn	Shallow bay flat (6 ft)	#5 inline spinner, Spoon (red/white)
Summer	8 to 20 ft	dawn & dusk	Main-lake point (21 ft)	Bucktail, Weedless spoon over cabbage
Fall	6 to 18 ft	midday & dawn	Shallow bay flat (6 ft)	Big rubber (Bull Dawg style), Husky-style jerkbait
Winter	5 to 15 ft	midday	Shallow bay flat (6 ft)	Tip-ups, Large jigging spoon

Smallmouth Bass fishing at Loon Lake

The spring pattern is a shallow one: smallmouth bass in 3 to 12 ft. As the season builds they drop to 10 to 30 ft, wintering in 20 to 45 ft. Top water on the chart: Main-lake point, a point in the 21 ft range, prime in fall. Time it for early morning and the evening. Summer baits: a drop shot (goby/minnow) or a ned rig gets it done.

Season	Depth	Best window	Start at	Go-to baits
Spring	3 to 12 ft	dawn & dusk	open water	Ned rig, Tube jig
Summer	10 to 30 ft	dawn & dusk	Main-lake point (21 ft)	Drop shot (goby/minnow), Ned rig
Fall	8 to 25 ft	midday & dawn	Main-lake point (21 ft)	Jerkbait, Blade bait
Winter	20 to 45 ft	midday	Break off the point (38 ft)	Blade bait, Hair jig

Largemouth Bass fishing at Loon Lake

Start shallow in spring: largemouth bass sit in 2 to 10 ft that time of year. Summer pushes them deeper, 8 to 20 ft, and winter fish settle into 15 to 35 ft. The spot to know is Shallow bay flat, a feeding flat in about 6 ft of water that rates prime for largemouth bass in spring. Warm-month bites cluster around early morning and the evening. Throw a texas-rigged 10" worm or a deep-diving crankbait until the fish tell you otherwise.

Season	Depth	Best window	Start at	Go-to baits
Spring	2 to 10 ft	dawn & dusk	Shallow bay flat (6 ft)	Spinnerbait, Chatterbait
Summer	8 to 20 ft	dawn & dusk	Main-lake point (21 ft)	Texas-rigged 10" worm, Deep-diving crankbait
Fall	4 to 15 ft	midday & dawn	Shallow bay flat (6 ft)	Squarebill crankbait (shad), Spinnerbait
Winter	15 to 35 ft	midday	Break off the point (38 ft)	Blade bait, Jigging spoon

Loon Lake also holds rock bass (5 to 20 ft in summer), crappie (10 to 25 ft in summer), bluegill (4 to 15 ft in summer), pumpkinseed (2 to 10 ft in summer), brown bullhead (3 to 12 ft in summer). Pick any of them on the map above for rated spots and bait picks.

Notable structure

The chart marks 5 structure features on Loon Lake; the deepest is Deep basin at about 60 ft.

Deep basin: deep basin, around 60 ft
Break off the point: drop-off, around 38 ft
Main-lake point: point, around 21 ft
Secondary point: point, around 21 ft
Shallow bay flat: feeding flat, around 6 ft

Loon Lake fishing regulations

Season dates, license requirements, and size and bag limits for Ontario waters are set by the Ontario fishing regulations (FMZ summary) — and special regulations can apply to Loon Lake specifically, so confirm the current rules before you fish.

Check the official Ontario fishing regulations →

Common questions

How deep is Loon Lake?

Loon Lake is about 60 ft (18 m) deep at its deepest point. The depth data here comes from a transect sounding survey by the Ontario MNRF.

What fish are in Loon Lake?

Anglers target cisco (lake herring), walleye, yellow perch, northern pike, smallmouth bass, largemouth bass, rock bass, crappie, bluegill, pumpkinseed, brown bullhead on Loon Lake. This isn't a survey of the lake — none is on record for it — but an informed estimate from the species Ontario's MNRF recorded in the nearest surveyed lakes, filtered to this lake's depth and habitat.

Where is the best fishing spot on Loon Lake?

Deep basin is the top-rated area: a deep basin in about 60 ft of water that rates prime for cisco (lake herring) in summer. Open the map above to see every rated spot for each species and season.

When is the best time to fish Loon Lake?

For cisco (lake herring), the summer bite is best in early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.

What are the fishing regulations for Loon Lake?

Fishing on Loon Lake is regulated by the Ontario fishing regulations (FMZ summary). Check the official Ontario regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.

Nearby waters

Fourth Deposit Lake 1 mi · Chippego Lake 1 mi · Third Depot L. 1 mi · Second Depot Lake 3 mi · Fifth Depot Lake 3 mi · Sixth Depot Lake 5 mi · Elbow Lake 5 mi · Bear Lake 6 mi · First Depot L. 6 mi · Cole Lake 6 mi · Norway Lake 7 mi · St. Andrews Lake 7 mi

See how Loon Lake stacks up: best largemouth bass lakes in Ontario · best smallmouth bass lakes in Ontario · best walleye lakes in Ontario · best northern pike lakes in Ontario

More water nearby: Frontenac County fishing maps (127 charts). Browse all Ontario fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.